By default, the Primary DNS Suffix of a member computer of an Active Directory domain is configured to change automatically when domain membership of the computer changes. The same default behavior is true when the DNS name of the domain to which a computer is joined changes. Thus, rename of an Active Directory domain can cause modification of the primary DNS suffix and, therefore, of the full DNS host names of the computers that are the members of the renamed domain.

1. Still in Ws1, click "Start > Run", enter "adsiedit.msc".

2. Right-click "ADSI edit', select "Connect to".

3. Next to "Computer", select "Select or type a domain or server", type "dc1.contoso.com".